A constructionengineer has been asked to recomment an excavator for acquisition. Three

alternatives have been identified, having the characteristics shown in the following table.

a$)$ Apply present worth analysis.

b$)$ Use shortest life to establish the planning horizon's length and apply present woth

analysis again.

c$)$ Use longest life to establish the planning horizon's length and apply present woth analysis

once more.

d$)$ Repeat PW analysis for $10$ years standard analysis period.

e$)$ Consider an infinitely long planning period and calculate the annual worth for each

investment alternatives.